Sandpapering-machine



N. M. BELONG.

SANDPAPERING MACHINE.

APPLICATION min 1mm 10. ms. RENEWED AUG. 16,1919.

1,331,843. Patented Feb. 24,1920.

5 SHEETSSHEET I.

A TTORNEVS N.M.- BELONG. SANDPAPERING MACHINE.

APPLICATION FILED JUNE 10, I916- RENEWED AUG. 16, 1919.

1,331,843. Patented Feb. 24,1920.

mu l

. Arm/mm N. M. DELONG.

SANDPAPERING MACHINE. 7

APPLICATION men JUNE 10, 1916. RENEWED AUG. 16, I919.

1,331,843. Patented Feb. 24,1920.

5 SHEETS-SHEET 5.

96 mum INVENTOR A47 500 W fifza/y' ATTORNEYS NELSON M. BELONG, OF WASHINGTON, DISTRICT OF COLUMBIA.

SANDPAPERING-MACHINE.

Specification of Letters Patent.

- Patented Feb. 24, 1920.

' Application filed June lO, 1916, Serial No. 102,891. Renewed August 16, 1919. SerialNo. 318,039.

To all whom it may concern Be it known that I, NELSON M. Dnnonc, a citizen of the United States, and a resident of the city of lVashington, in the District of Columbia, have invented a certain new and useful Improvement in Sandpapering- Machines, of which the following is a specification.

My invention relates generally tosurfacing machines, andL more particularly to sand papering machines, my primary object being to provide a machine for sand papering moldings including an arrangement by and clean and generally better results attained. p

A further object is to provide an apparatus whereby the above and certain other advantages may be attained, whichwill be comparatively simple and inexpensive by which the sand paper and sandpaper forms may be readily and quickly changed, by which certain yielding movements of the forms may be permitted, and which will at the same time be strong, durable, and-effective in its operation.

My invention, together with its objects and advantages, will be apparent from the following description thereof, reference being made to the accompanying drawings, forming a part of this specification, and wherein- Figure 1 is a side elevation of the lower part of the machine. Fig. 2 is a similar View of the upper portion thereof. d

Fig. 3 is a sectional top plan. view thereof. Fig 4 is a transverse vertical section taken therethrough substantially on line of 7 Fig. 10 is a detail horizontal section taken substantially on line 10-10 of Fig. 7.

Fig. 11 is a detail perspective view of one of the form boxes and its cover, in detached relation.

i 12 is a detail perspective view of one of the forms, spacing blocks, and liners, detached.

Fig. '18 is a detail section taken substantially on line 1313 of Fig. 2.

Referring now to these figures, my inven tion includes a lower main stationary frame including rigidly connected upright plates which the edges between vertical, curved, 10, 11, and 12, horizontally spaced, and

and horizontal surfaces may be cut sharp from the central portion of the rear plate 12 of which rise a' pair of longitudinally spaced supporting posts 13, these posts being of course rigid with the main frame.

Horizontally along the other portion of the main frame, aboveand between the plates 10 and 11 as particularly seen in Fig. 4, is the upper run of an endless conveyer belt 14. extending over guide rollers 15 journaled in the main frame, and around end rollers 16, the latter of which are journaled in the ends of the main frame, the belt 14 also extending downwardly in the main frame and around a substantially central roller 17 and over rollers 18 and 19, the latter of which are spaced above and at opposite sides of the roller 17, these several rollers 17 1S,

' and 19 having intermeshing gears 17, 18,

and 19 by which rotation of one thereof is communicated to the other, for a purpose which will be presentl described.

The shaft of the roller 19 is extendedforwardly of the machine, andprovided with a hand wheel 20 whereby the belt 14 may be moved in either direction by hand, a pair of gear wheels 21 and 22 being provided respectively for engagement with the gears 17 and 19 of the rol ers 17 and 19. The' ears 21 and 22 are mounted at opposite ends of a bracket 23, the latter ofwhich is journaled upon a shaft 24 provided with an extending arm 25, the gears so disposed being in mesh with, and at opposite sides of, a gear 26secured upon shaft 24. V

Secured also upon the shaft 24 is a pulley 27 connected by a belt 28 to the pulley 29 of a driven'shaft 30, the latter of which is provided with a second pulley 31 connected by a belt 32 to the pulley 33 of a shaft'34.

' in the opposite end opening 36, the gear 22 will be in engagement with the gear 19 of the roller 19, to move belt 14 in the opposite direction. Vith the pin 37 in the intermediate opening 36, the gears 21' and 22 will be held out of engagement with the gears of the rollers 17 and 19 and thus in neutral position, permittingthe belt 14 to be manually moved in either direction by manipulation of the handrwheel 20 before re ferred to. v

The shaft 34; just above referred to, is provided with a second pulley '38 from j which extends a belt 39, the latter projecting vertically above the main frame in the space between the plates 11 and 12 of' the said frame, and around guide rollers 40 journaled in the inner free ends of an arm 41journaled at its outer end upon the shaft 34, and thus acting to'plaoe ten .sion upon the belt 39 and take up all slack in the latter. v

"By reference-to Fig. 1 it will also be noted that the roller 18 is journaled in a bracket 42 in turn journaled at one end upon the shaft 43 of the roller 17, the opposite end of the bracket 42 being attached to one end of a flexible connection 43-passing around a guide roller 44 and provided at its opposite end with a Weight 45 whereby to place desired tension upon the endless conveylngbelt 14 and prevent undue slack in the latter. 1

At the upper portions of the vertically .projecting supporting posts 13, as best seen by reference to Figs. 4 and 5, is secured a bearing frame 46 having end bearings 47 engaging the said posts and adjustable thereon, and provided with set screws 48 whereby they may be secured in desired adjustment, thesaid bearing frame extending between the said posts and slightly in advance thereof, as seen by reference to Fig. 4.

An adjusting bracket 49 extending forwardly of, andabove, the bearing frame46j, is also provided with upperandlower side bearings 50 adjustably disposed upon the .post;13 above and below the bearings 47, and also provided with set screws 51 whereby the bracket'49'may be secured in desired -vertical adjustment. An adjusting screw 52 is headed vertically through the central portion of the bracket 49-, and has a 'swiveled co n ion at 3.-i PQ rthe;b lg fra e 6,

the upper end of the screw 52 having a hand wheel 54 providing for its manipulation to adjust the bracket 49 vertically with respect to the bearing frame 46, screw 52 being also provided with a nut 55 thereon above the bracket 49 in order te -lock the screw 52 against accidental rotation.

To the forward portion of the'bracket 49, as best seen in Figs. 3 and 4, is secured the rear central portion of an upperadjustable frame including a top plate 56 arranged in spaced parallel relation above the upper run of the conveyeinbelt 14, and. having spaced depending strips 57 at intervals alonglit's front and rear edges, it being thus apparentthat adjustment of the bracket 49 through the action ,of the screw 52 also adj'uststheupper frame including the horizontal upper plate 56 vertically with respectto the ,upper run of the conveyer belt 14.

In the lower central portion of the upper adjustable frame is journaled a horizontal crank shaft 58 having cranks 59 and 60 and having a. rear pulley '61 above the. space between the plates 11 and 12 of the lowermain frame, to receivethe upper portion of the belt 39 before referred, which thusprovides for rotation ofthe crank shaft, from the cranks 59 and 60 of which extend pitmen 62 and63 projecting towardopposite ends 'of the machine, as plainly seen by reference to Fig. 2.

in its length, are a plurality of set rollers 64, each of which has a shaft 65, the, ends of which are received in the inner ends of tubular supports 66, the outer portions of which are adjustably clamped, by means of clamping screws 67, in and through the lower bearing 68 of vertically disposed sup porting stems 69, the upper portions of which are cylindrical and pass through Carried by the upper adjustable frame 56 i bearings 70 at theupper and lower portions of certain of the vertical strips 57 of the upper adjustable frame before referred to,

the upper ends of the stems 69 being connected by rigid cross heads 70 above the adjustable frame 56. i

By'referring to Figs. 2 and 13, it will be noted that each of the stems 69 is provided with a threaded bushing 72 interfitting and bearing upon the lower bearing 70 just above referred to, and which receives thereagainst the lower end of a spring7 3 coiled around this particular stem and bearing at itsupper end against the upper bearing. 7 0.

thus providing for vertical adjustment of v the stems 69 and at the same time allowing for uniform tension of the spring 73 at all times. i

The rollers 64"are preferably provided with tires 74 of rubber or other suitable yielding material, and are adapted to di-.

rectly engage the moldinggsuch as shown at V A in, several of the figures, at a -plurality of points in the length of the molding, upon the upper run of the belt let, and preferably in grooves of the molding in order to prevent lateral shifting thereof.

Below the spaces between the several vertical strips 57 of the upper adjustable frame 56, are disposed form boxes 75, each of which is identical with the others except as regards the particular shape of the forms clamped therein, and includes as best seen in Fig. 11, a rectangular body 76 having an inwardly projecting flange 77 around its lower edge and detachably bolted to a cover 78, the latter of which is provided adjacent its forward and rear edges with. upright apertured bearings 79 spaced apart and for a purpose to be presently described. The cover of each of the form boxes is also provided at its opposite side with vertically projecting and apertured lugs 80, the lugs at one side of the boxes nearest the crank shaft 58 being connected to the pitmen 62 and 63, and the adjacent lugs of the other boxes being connected by lugs 81 so that during the operation the several form boxes will be continuously reciprocated.

To this end the forward and rear bearings 79 of each of the form boxes receive the lower side bars 82 of its respective frame, said lower side bars being connected at their opposite ends to uprights 83 journaled through bearings 8 carried by the up right strips 57 of the upper adjustable frame, the upperends of the uprights 83 being connected by cross bars 85 and the cross bars of each frame being in turn connected at points centrally thereof and above the frame 56, by longitudinal bars 86. Thus each of the form boxes 75 is independently adjustable in a vertical direction, not only of the other form boxes but also with respect to the vertically adjustable frame 56.

Above each of the form boxes 75 the vertically adjustable frame 56 is provided with upstanding lugs 87 upon which are intermediately pivoted rods 88 having flattened central portions 89 provided with longitudinal slots 90 therein through which the upperintermediate bar 86 of the respective form box frame extends, the rod 88 being provided at its opposite end with adjustable weights 91 and 92, as clearly seen by refer ence to Fig. 6, whereby the pressure upon the particular form box may be regulated.

Furthermore, the frame ofeach of the form boxes 75 may be held in raised posi- 'tion in order that its forms to be hereinafter described may be changed, or its sand paper renewed, by means of an arcuate holder 93 pivoted to the vertically adjustable frame 56 at 94: and having inner side shoulders and 96, the former of which is adapted to engage the forward portion of the rod 88 when the latter is elevated to raise the particular form box and its frame and maintainthe latter in upper inoperative position, as shown at the extreme left in Fig. 2. V

In the body 76 of each of the form boxes 7 5, is disposed a frame 97 adaptedtorestupon the lower flange 77 of the box and removable from the box when the body 76 thereof is detached from the cover 78, the said frame 97 having surrounding grooves in which are disposed cushion rings 98 and 99, both of which it will be noted project beyond the limits of the frame 97 for engagement with the inner surfaces of'the body 76 of the box, in order to allow the frame 97 limited lateral movement, the upper cushion ring 99 also projecting above the top of the frame 97 and with the parts connected as shown in Fig. 7, engaging the lower surface of the cover 78 allowing frame 97 a limited vertical movement. 7

At one'side of each of the frames 97 is a vertically journaled post 1.00 having an up.- per handle 101 and having a lower cam 1.02.

The several forms 103 are adjusted within the frame 97 between spacing blocks 10st and one or more liners 105 as seen in Fig. 9,,side plates 106 being disposed against the outer faces of the spacing blocks 104 one for engagement against one'side of the frame 97 and the other for engagement by the cam 102 in order to lock the form and its spacing blocks firmly within the frame.

These form blocks 103 may, of course, be of various shapes dependent upon the particular molding A to be sanded, each of the form blocks 103 having sand paper 107 folded ther'earound and clamped thereagainst by the spacing block 104 and liners 105 and presented by the'form block against the respective surface of the .molding A,it being noted that the form block in each instance is extended materially beyond the particular surface to'be sanded thereby, so as to project beyond a corner between its particular surface and the surface sanded by the adjacent form block, so that the several form bloc (S, each of which projects partly into the space to be occupied by another block, thus provide for sharp clean edges between the several angular slots and curved surfaces of the molding A. 1

It is obvious that the several form'blocks 103 may be readily adjusted without removing the same from the frame 97, through the openings of the cap78, as plainly seen in Figs. 7 8, and 1.1, by loosening the cam iio clamp 102, it being noted that ea h of the spacing blocks 10 1 and liners 105 has a shouldered portion 108 at each side, as

plainly seen by reference to Fig. 8, resting are removed; for removal of the sand paper-.1 1,

It is obvious that, in view of the extension of each of the form blocks beyond its particular surface to be sanded, as just above described, it isnecessary to provide a plurality of form boxes, and that each of the arcuate shaped latches ,93 capable of holding a particular form box 75 in upper inoperative position by engagement of its shoulder at one side with the corresponding counterweighted arm 88, is alsocapable of holding its form box at the properworkiug level by engagement of its opposite side shoulder 96 with the rod 88. In operation, however, the latch 93 is entirely disengaged from the rod 88 as shown at the right in Fig. 2. v

In operation with the controlling arm in neutral position to hold the gears 21 and 22 disengaged, the belt llmay be rotated through the action of the hand wheel 20, so as to manually shift or feed one end. of the molding A to be sanded, beneath the several clutch rollers (34. The frame 56 having been adjusted so that with the several form blocks properly engaged and adjusted with in the boxes 75- and the latter, when held by the latch shoulders 96, are in proper working position upon the molding, the operating arm is then shifted to the position shown in Fig. 1, engaging its gear 21 as seen, so that the power supplied to the shaft will be transmitted through the belt 28 and through the gearing connections to the feed belt 14:.

At the same time rotation is transmitted to the pulley 61 through the belts 32 and 39, in order to actuate the crank shaft 58 which, through the pitmen 62 and (33 and the links 81, reciprocates all ofthe form boxes 75 to secure the desired sanding operation upon the molding A.

At any time during the operation where a particularly rough spot on the molding is encountered, the controlling arm 25 may be moved to neutral position and the feed'belt 14: shifted backward and forward through the manualactuation of the hand wheel 20, or, it may be shifted to the lower opening 36 of the bracket to carry the moldings in an opposite direction through the reversing of the direction of movement of the feed belt 14. I It is thus apparent that I provide an apparatus readily capable of attaining the objects above set forth, and having the various advantages both as to its construction and operation heretofore enumerated.

It is further obvious that the machine is both strong and durable, capable of a wide range of adjustment, and the sanding parts of which are 'yieldably both laterally and Vertically and held, through the action of the counterweighted rod 88 inselected pressure against theimolding to be sanded, de-

pendent upon the numberrof form blocks carried by the particular form box and the relative width ofthe surfaces of the moldings engaged by such form blocks.

I claim:

1. In a molding sander, the combination of a series of sanding devices, an endless feed belt upon which molding is fed beneath said devices, rollers around which said belt extends, certain of which have engaging gears, a driven shaft, a shaft adjacent said roller gears having connection with the driven shaft, a gear on said latter shaft, a controlling arm journaled 011 said latter shaft, a pair of gears carried by said con trolling arm at opposite sides of, and in mesh with, said shaft gear, and shiftable by movement of the said controlling arm into and out of engagement with the gears of the said belt rollers.

2. In a molding sander, the combination of a series of sanding devices, an endless feed belt upon which molding is fed beneath said devices, rollers around which said belt extends, certain of which have engaging gears, a driven shaft, a shaft adjacent said roller gears having connection with the driven shaft, a gear on said latter shaft, a controlling arm j ournaled on said latter shaft, a pair of gears carried by said controlling arm at opposite sides of, and in mesh with, said shaft gear, and shiftable by movement of the said controlling arm into and out of engagement with the gears of the saidbelt rollers, and means for securing said controlling arm in adjusted position.

3. In a molding sander, the combination of a series of sanding devices, an endless feed belt upon which molding is fed beneath said devices, rollers around whichsaid belt extends, certain of which have engaging gears, a driven shaft, gearing connections between said driven shaft and said rollers, ll'iClllCllDg rotating gears each of which is engageable with, and disengageable from, one of said roller gears, and means for controlling the said rotating gears. l. In a molding sander, the combination of a series of sanding devices, an endless feed belt upon which molding is fed beneath said devices, rollers around which said belt extends, a driven shaft, gearing connections between said driven shaft and certain of said rollers whereby to move the feed belt, and means attached to one of said rollers for shifting the feed belt by hand.

5. In a molding sander, the-combination of a series of sanding devices, an endless feed beltupon which molding is fed beneath said devices, rollers around which said belt extends, a driven shaft, gearing connections between said drivenshaft and certain, of said rollers whereby to move the feed belt, means attached to one of said rollers for shifting the feed belt by hand and including a shaft on which'one of said rollers is mounted, and a hand wheelsecured upon said shaft.

6. In a molding sander, the combination of a series of sanding devices,an endless feed belt upon which molding is fed beneath said devices, rollers aroundv which said belt extends, a driven shaft, gearing connections between said driven shaft and certain of said rollers whereby to move the feed belt, said gearing connections including gears shiftable into and out of engaged position, and means for manually shifting the feed belt. 7. In a molding sander, the combination of a series of sanding devices, an endless feed belt upon which molding is fed beneath said devices, rollers around which said belt extends, a driven shaft, gearing connections between said driven shaft and certain of said rollers whereby to move the feed belt,

and means for controlling the direction of movement of the feed belt. I

8. In a molding sander, the combination of a series of -sanding devices, .an endless feed belt upon which the molding is fed beneath said devices, rollers around which said feed belt extends, a driven shaft, gearing connections for moving said feed. belt in relatively opposite directions extending between the driven shaft and certain of the rollers of the feed belt and including shiftable direction changing gears, and means for controlling the shift ng [movement of said latter gears.

9. In a molding sander, a plurality of sanding devices, each of which includes a box, a frame within and removable from said box, and a form block adjustably clamped within said'frame,-said frame having yielding movement with respect to the said box. 7

10. In a molding sander, a plurality of sanding devices, each of which includes a box, a frame within and removable from said box, and a form block adjustably clamped within said frame, said frame having surrounding grooves,and yielding rings disposed in said grooves and engaging the inner sides of the box.

11. In a molding sander, a plurality of sanding devices, each of'which includes a.

.ers supported by and through the said'bearings and on whichthe boxes are slidable, and means .for reciprocating the several boxes.

12. In a molding sander, a vertically adjustable carrying frame, a plurality f sanding frames having bearings on said carrying frame and adjustable vertically with respect thereto, a rodhaving an intermediate piyotal connection upon the said carrying frame and also having an intermediate pivotal connection with one of the sanding frames, weights adjustably held upon the opposite end portions of the said rod, a sanding box removably mounted in the lower end of each of the sanding frames, and a sanding block adjustably carried by each of the said boxes.

13. In a molding sander, a vertically adjustable carrying frame, a plurality of sanding devices each including a sandmg frame vertically adjustable with respect to, and carried by, said carrying frame, counterbalanced pressure means for each of the said sanding frames carried by the carrying frame, and a latch supported by the carrying frame adjacent each of the sanding frames and engageable with the latter to support the same in upper and lower positions. V 14. In a molding sander, a vertically adjustable carrying frame, a plurality of sanding devices supported by said frame, and a plurality of molding-engaging guide rolldepending below the said carrying frame, each of said rollers having a shaft projected upon opposite sides thereof, tubular supports into which the ends of said shafts extend, and spring controlled hanger bars having bearing upon the carrying frame and in the lower ends of }which said tubular supports are adjustably eld.

15. A molding sander, including a main frame, an upper vertically adjustable carrying frame, and a plurality of sanding devices each including a frame independently adjustable vertically on the upper carrying.

frame, and a sanding box horizontally shiftable in the lower portion 'of the sanding frame.

NELSON M. DELONG. 

